Figure 1
Figures 1-2. Fundus photographs of a 69 year old man who noted a sudden dense paracentral scotoma.

Figure 2

Questions

1. What is your diagnosis?
2. What is the most likely etiology for this condition?
3. What are the most common sources of emboli to the retina?
4. Why is the affected area characteristically whitened?
5. What other clinical investigations should be considered?
6. How would you treat this patient?